This composition
is not attested before the Book of the Dead; it is less common than the variant
Chapter 30B, frequently found inscribed on heart scarabs - large scarab-shaped
amulets of hard green-black stones, placed over the heart. The earliest heart
scarabs inscribed with chapter 30 date to the mid-Thirteenth Dynasty, and
the practice of placing a large scarab over the heart continued at least to
the third century BC.

The following example
is taken from an Eighteenth Dynasty Book of the Dead on papyrus, preserved
in Hannover (Kestner Museum 1970.37), published in the Book of the Dead project
of Bonn and Cologne Universities (Munro
1995):